Snecma

Snecma Moteurs

Eric Seinturier

Jean-Pierre Lombard

Yvon Cloarec

Francois Maurice Garcin

Jerome Alain Dupeux

Stephane Jean Joseph Baumhauer

Marc Berthillier

François Maurice Garcin

Etienne Balmes

Jérôme Dupeux

Christian Dupont

Jean-Pierre François Lombard

Stéphane Jean Joseph Baumhauer

Jérôme Alain Dupeux

An impeller including a blade, a support of the blade which extends substantially radially, at least one intermediate part extending, in a substantially axial direction, between the blade and the support of the blade, and at least one damping device placed on at least one face of the intermediate part is disclosed. The damping device is segmented in an axial and/or circumferential direction into at least two elementary damping devices.

Movable impeller for a turbojet and turbojet comprising same

A method to introduce a deliberate mismatch into a turbomachine bladed wheel so as to reduce vibration amplitudes of the wheel in forced response. The method includes a step of determining an optimum value of the standard deviation for the mismatch as a function of operating conditions of the wheel inside the turbomachine, with respect to the maximum vibration amplitude response required on the wheel. The method further includes a step of at least partly placing blades with different natural frequencies on the wheel such that the standard deviation of the frequency distribution of all blades is equal to at least the mismatch value, the mismatch value being determined statistically.

Method for introducing a deliberate mismatch on a turbomachine bladed wheel and bladed wheel with a deliberate mismatch

A method of reducing vibration in a structure comprising at least one rotor () and a fixed set of sources of disturbance () liable to give rise to disturbances in the fluid flow () that cause the rotor to vibrate, the method comprising a step of distributing the fixed sources of disturbance angularly in non-uniform manner so as to reduce the amplitude of excitation as seen by the rotor, and a step which consists in verifying that the maximum amplitude of a response of the rotor to the excitation is obtained by:

Structure comprising a rotor and fixed perturbation sources and method for reducing vibrations in said structure

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Bruges, France

Eric Seinturier